Process for producing shrink film and resultant shrink film layers and laminates

(19)

(11)

EP 0 498 249 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.04.1993 Bulletin 1993/15

(43)	Date of publication A2:
	12.08.1992 Bulletin 1992/33

(21)	Application number: 92101256.3

(22)	Date of filing: 27.01.1992

(51)	International Patent Classification (IPC)⁵: B29C 61/06

(84)	Designated Contracting States:
	DE ES FR GB IT

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Priority:

07.02.1991 US 651966

(71)	Applicant: HERCULES INCORPORATED
	Wilmington, Delaware 19894-0001 (US)

(72)	Inventors:
	Anderson, Harry Sutton, II Elkton, Maryland 21921 (US) Ristey, William Jerome Berwyn, Pennsylvania 19312 (US) Senich, George Albert Malvern, Pennsylvania 19355 (US)

(74)	Representative: Vogeser, Werner, Dipl.-Ing. et al
	Patent- und Rechtsanwälte Hansmann, Vogeser, Dr. Boecker, Alber, Dr. Strych, Liedl Albert-Rosshaupter-Strasse 65 D-81369 München D-81369 München (DE)

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References cited: :

(54)	Process for producing shrink film and resultant shrink film layers and laminates

(57) A process for utilizing oriented polypropylene films to produce polyolefin shrink films having high unidirectional shrinkage. The thermal shrink properties of the films used in accordance with the present invention are characterized by shrinkage in the machine direction and transverse direction as a function of temperature. The shrink films of the present invention are used to label non-uniform contoured containers with printed single layer or laminated shrink film, and by exposure to a prescribed heat history, shrink the film to conform to the contour of the container.

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